Impact Factor:11.4
DOI number:10.1016/j.rse.2025.115089
Journal:Remote Sensing of Environment
Key Words:Thermal radiation directionality Land surface temperature Angular normalization
Abstract:The thermal radiation directionality (TRD) effect is a critical factor influencing the global application of thermal infrared remote sensing data, and limiting the comparison of long-term temporal data series. The inherent inconsistency of thermal radiation data acquired from different observation angles poses significant challenges for data utilization and analysis. To address this issue, this study develops a dual-band parametric angular normalization (DPAN) method based on physical model. The key parameters for angular normalization are firstly derived through theoretical analysis, then empirical estimation formulas for these parameters are established. Analysis based on simulation dataset demonstrates that the DPAN method can correct an average of 62 % of thermal radiation angular effects, with maximum corrections reaching 66–68 % and minimum corrections approximately 47–49 % under various input parameter errors. A wavelength difference of 2–3.5 μm is found to be the best for the dual-band setting to apply the DPAN method. When applied to actual Moderate Resolution Imaging Spectroradiometer (MODIS) data, the method achieves a radiative brightness temperature root mean square difference (RMSD) of approximately 1.3 K, with maximum correction exceeding 8 K. Notably, temperature corrections typically surpass 1 K when the view zenith angle exceeds 40°. In summary, the DPAN method requires neither multi-angle nor multi-temporal observations, enabling direct application to any satellite dataset with at least two thermal infrared bands. These characteristics satisfy the essential requirements for operational angular normalization of satellite-derived land surface temperature products, indicating strong potential for widespread implementation.
Indexed by:Journal paper
Document Code:115089
Discipline:Natural Science
First-Level Discipline:Geography
Document Type:J
Volume:332
Page Number:115089
Translation or Not:no
Included Journals:SCI
Links to published journals:https://www.sciencedirect.com/science/article/pii/S0034425725004936?via%3Dihub
First Author:Yuanjian Teng
Correspondence Author:Huazhong Ren
All the Authors:Songyi Lin,Fengguang Li,Yunzhu Tao,Xue Zhong,Qiming Qin
Date of Publication:2025-10-13